It’s fair to say that AMD’s Vega cards didn’t really make the impact many had hoped they would. Of the two launched, the ~£400 Vega 56 is the most attractive, but it’s not always easy to find, as cryptominers keep eating up stock, and third-party SKUs are rather awkwardly very absent. Still, the Vega 56 poses a respectable challenge to Nvidia’s GTX 1070, and now comes the response from the green team. The GTX 1070 Ti merges most of the GTX 1080’s cores with GTX 1070 memory into a £419 part designed to beat the AMD offering, while conveniently giving Nvidia a new part to push in the release-heavy holiday period with GP104 yields that didn’t quite make the cut as GTX 1080s.

The MSRP of £419 is the starting price, covering the Founders Edition we have here today and a selection of basic third-party designs. It’s a price that puts the GTX 1070 Ti roughly in between the GTX 1070 and GTX 1080 at the time of writing – as you would expect. Today is a hard launch not only of the Founders Edition but also of the various third-party designs from board partners, although Nvidia seems to have hindered its partners in terms of clock speeds, as all cards appear to be shipping at reference clocks, most likely out of fear of the GTX 1070 Ti rendering the GTX 1080 moot. While it seeks to outdo the RX Vega 56, the GTX 1070 Ti also targets GTX 970 customers that might now be looking for an upgrade, with Nvidia claiming that the new card offers roughly double the performance of the older one.

Nvidia GeForce GTX 1080 8GB

Nvidia GeForce GTX 1070 Ti 8GB

Nvidia GeForce GTX 1070 8GB

Architecture

Pascal

Pascal

Pascal

Codename

GP104

GP104

GP104

Base Clock

1,607MHz

1,607MHz

1,506MHz

Boost Clock

1,733MHz

1,683MHz

1,683MHz

Stream Processors

2,560

2,432

1,920

Layout

4 GPCs, 20 SMs

4 GPCs, 19 SMs

3 GPCs, 15 SMs

Texture Units

160

152

120

ROPS

64

64

64

FP64 Performance

1/32 FP32

1/32 FP32

1/32 FP32

Transistors

7.2 billion

7.2 billion

7.2 billion

Die Size

314mm2

314mm2

314mm2

Process

16nm

16nm

16nm

Memory

8GB GDDR5X

8GB GDDR5

8GB GDDR5

Memory Frequency

1.25GHz (10Gbps effective)

2GHz (8Gbps effective)

2GHz (8Gbps effective)

Memory Interface

256-bit

256-bit

256-bit

Memory Bandwidth

320GB/s

256GB/s

256GB/s

Power Connectors

1 x eight-pin

1 x eight-pin

1 x eight-pin

Stock Card Length

267mm

267mm

267mm

TDP

180W

180W

150W

The GTX 1070 Ti is based on the same 314mm2, 16nm, 7.2bn-transistor GP104 Pascal GPU as the GTX 1080, but one of the 20 onboard streaming multiprocessors is disabled, leaving us with 2,432 cores and 152 texture units – a five percent reduction in raw processing power. The 64 ROPs and 2MB L2 cache remain intact, and the GPU comes with a base clock of 1,607MHz – same as GTX 1080 – and a boost clock of 1,683MHz.

On the memory front, the new card is all GTX 1070, utilising an 8GB GDDR5 frame buffer running at 8Gbps across a 256-bit bus for 256GB/s of raw memory bandwidth – significantly less than the 320GB/s that the GTX 1080 has courtesy of GDDR5X memory.

The GTX 1070 Ti has a TDP of 180W, and as such the single eight-pin PCIe power connector is easily suitable.

Display outputs remain unchanged from previous reference GP104 designs, so we have a trio of DisplayPort 1.4 headers alongside a single HDMI 2.0b port and a dual-link DVI-D connection.

The cooler design is the same as it was with the GTX 1080 Founders Edition, which is no bad thing. As well as a black metal backplate, the main shroud is crafted into the same angular design with silver and black anodised aluminium that still holds considerable visual appeal. Once again, there is a GeForce GTX logo backlit with green LEDs along the top edge.

A copper baseplate connects to a vapour chamber for efficient GPU cooling, while a large metal surface area connects via thermal pads to the memory modules and critical VRM components. A single radial fan then cools the heatsink fins to which these contact surfaces are connected, with air being directed straight out of the rear I/O panel. It's actually the same cooler that's used on the GTX 1080 Ti Founders Edition, which is a 250W TDP GPU; Nvidia says the extra headroom will benefit overclocking.

The PCB is another familiar sight, and the GTX 1070 Ti uses the same five-phase, dual-FET power supply as the GTX 1080, which again is said to aid overclocking potential. A pair of SLI fingers can be used with Nvidia's high-bandwidth SLI bridge to run the GTX 1070 Ti in two-way SLI.